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Other income (loss), net
 12 Months Ended
Dec. 31, 2025
Other Income and Expenses [Abstract]  
Other income (loss), net Other income (loss), net
The table below summarizes the components reported in Operating Expenses Other income, net (in thousands):
Year Ended December 31,
20252024
Gain on sale of equipment$805 $4,219 
Loss on impairment of assets(640)— 
Gain on sale of patents and intellectual property— 3,641 
Gain on forfeiture of non-refundable deposits— 1,550 
Total$165 $9,410 
In September 2025, the Company entered into an Equipment Purchase Agreement to sell one Ball Mill for $4.0 million, before commissions and expenses. The Company recorded a $2.8 million reduction to equipment not-in-use and recognized $0.7 million, net of commissions as Other income (loss), net for the sale of the Ball Mill for the year ended December 31, 2025.
Additionally, the Company sold miscellaneous unused inventories for a net gain of $0.1 million during the year ended December 31, 2025.
Additionally, after the November 2025 agreement to extinguish the Crofoot Royalty agreement, the Company determined that the advanced royalty payment would not benefit future operations and wrote off $0.6 million in advanced royalty payments.
The table below summarizes the components reported in non-operating Other income (loss), net (in thousands):
Year Ended December 31,
20252024
Gain on extinguishment of debt9,154 — 
Unrealized gain (loss) on equity securities1,815 (1,588)
Gain on fair value adjustment for warrant liabilities6 15 
Other miscellaneous (expense) income(6)50 
Realized loss on sale of equity securities(525)— 
Total$10,444 $(1,523)